Yes, but if he misses the steal, he will give up on the play. He does this frequently.
He's usually guarding the 2nd option though

I would hope Curry's athleticism is good enough to stay in front of an Austin Rivers, Russ Smith, Kendall Marshall. shyt.. I watched Ty Lawson blow by him when they played Houston.
He had to guard Rondo in their game against Sacramento and he was couldn't fight through screens so they were switching. Rondo had no problem getting by him, so they moved Iggy/Barbosa over to guard Rondo or had Draymond coming out to the wing to stop the pass off the screen. Down the stretch they put Klay/Barnes on Rondo.
Against the Nuggets, Mudiay was able to get by him, so they moved Klay/Iggy over. Then Jameer Nelson started going off on Steph so they moved Barnes over to Nelson

They clearly don't want to commit his energy or personal fouls to defense so he gets away with a lot of lazy defensive play
Alright, that looks fine to me now that its hashed out:
MJ = Montana
Kareem = Brady
Steph = Aaron Rodgers